Using bug 794758 as an example:
Could you change abrt to not include the timestamp in the summary ?
It makes it easier to spot dupes when looking at a list of bugs.
Also, the kernel: is sort of pointless too. We already know it's a kernel message :-)

(In reply to comment #0)
> Could you change abrt to not include the timestamp in the summary ?
> It makes it easier to spot dupes when looking at a list of bugs.
commit 30b97427e3028dddc32b69a23907ebdf9c63b26e
Author: Nikola Pajkovsky <npajkovs@redhat.com>
Date: Mon Feb 20 14:38:19 2012 +0100
dump-oops: fix removing jiffies time stamp
jiffies are unsigned long, so it can be 2^64 long, which is
20 decimal digits
Signed-off-by: Nikola Pajkovsky <npajkovs@redhat.com>

ah, right. That's a stack trace from an interrupt handler
In some cases, that will be all we get (see bug 796864 for example)
In other cases, we will get this in addition to a regular process stack.
Complicated.

https://bugzilla.redhat.com/show_bug.cgi?id=789517 is an even more complex example.
There we have an exception stack (NMI->EOE), an interrupt stack (IRQ->EOI) and a process stack.
I think in cases where we're getting multiple stacks, the hash should just be calculated on the process stack (if present). If not present, give up and hash the whole thing.
This is kinda off-topic from the original intent of this bug, which it sounds like you fixed, so feel free to clone this.

Package abrt-2.0.9-1.fc17, libreport-2.0.10-1.fc17:
* should fix your issue,
* was pushed to the Fedora 17 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing abrt-2.0.9-1.fc17 libreport-2.0.10-1.fc17'
as soon as you are able to, then reboot.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-4804/abrt-2.0.9-1.fc17,libreport-2.0.10-1.fc17
then log in and leave karma (feedback).